395000280 has 128 divisors (see below), whose sum is σ = 1339200000. Its totient is φ = 103531392.

The previous prime is 395000269. The next prime is 395000297. The reversal of 395000280 is 82000593.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60621 + ... + 66819.

It is an arithmetic number, because the mean of its divisors is an integer number (10462500).

Almost surely, 2^395000280 is an apocalyptic number.

395000280 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 395000280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (669600000).

395000280 is an abundant number, since it is smaller than the sum of its proper divisors (944199720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

395000280 is a wasteful number, since it uses less digits than its factorization.

395000280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6278 (or 6268 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 395000280 is about 19874.6139585150. The cubic root of 395000280 is about 733.7235654935.

The spelling of 395000280 in words is "three hundred ninety-five million, two hundred eighty", and thus it is an aban number.